Mash-tub



(No Model.)

W. MBDLIN. MASH TUB.

110.431,372. Patented July 1, 1890.

` THE ums Pneus co., Moro-mma, wnsmN-m'os, n. c.

UNITED STATES PATENT OFFICE.

TENZIJ MEDLIN, OF CLEVELAND, OHIO.

MASH-TU B.

SPECIFICATION forming part of Letters Patent No. 431,372, dated July 1,1890. Application led April 30, 1888. Renewed April '7, 1890. Serial No.346,822. (No model.)

T0 a/ZZ whom it 771/603/ concern:

Be it known that I, NVENZL MEDLIN, of Cleveland, in the county ofCuyahoga and State of Ohio, have invented certain new and usefulImprovements in Mash-Tubs; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use the same.

My invention relates to a combined mashtub and brew-kettle; and itconsists in certain features of construction and in combination of partshereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation in section takenthrough the center of the device. Fig. 2 is a plan in section on line a;a?, Fig. l. Fig. 3 is an elevation in detail.

In carrying out myinvention the combined mash-tub and brew-kettle is anuprightstructure, consisting of cylindrical section A, inverted conicalsection B, and crowning upper head C, all of these members being ofplate metal and riveted together after the manner of makingsteam-boilers- The lower head D is preferably of cast metal, having aflaring npwardly-projecting rim D', that f1ts next outside of the lowerend of plate B. Casing F surrounds section B, the upper portion of thiscasing being offset or' flanged at f to join the inner plate B, to whichit is riveted. Plates B and F at the lower ends thereof embrace theupper portion of rim D these three members being riveted together, thisrim at the upper extreme being thick enough to separate the plates asuitable distance to form a steam-chamber F', this part of the devicebeing known as a steam-jacket, induction steam-pipe f,-draincock f2, andthe necessary stay-bolts f3 being of course provided.

E is a pipe connecting with the bottom of head D for draining the vesseland for other purposes, hereinafter explained. Just above the inner faceof head D is a perforated false bottom or strainer G. A depression d inhead D serves as a box and stepping for the upright shaft H, this shaftpassing out above through stuffing-box e. Shaft l-I is provided with aseries of radial arms 7L, the blades thereof being set at an angle ofabout fortyiive degrees, more or less, from a perpendieu- Vto elevatethe mass in the vessel.

lar line, the lower edge of these blades moving in advance as the shaft`is rotated, by means of which the tendency of the blades is Section A isprovided with a series of Wings u., and section B is provided with aseries of wings l), these wings being set approximately at an angle ofabout forty-five degrees from radial lines. (See Fig. 2.) The action ofthese wings on the mass that is being rotated by arms L is to throw themass toward the center of the IH', the latter engaging pinion K ondriving shaft L. ShaftL is provided with driving and loose pulleys,l andZ, respectively, and is supported by boxes M and N, the former beingconnected with standards m and the latter being integral with yoke n.

O is a pressure-gage, andPaud I are handholes for charging anddischarging the vessel.

In operating the device, first, the vessel is charged with a suitablequantity of ground malt, and water is added. The mass by means of thesteam-jacket is heated until a steampressure of about twentytive poundsper square inch is had in the vessel.A Meantime the mass is agitated andthoroughly mixed by the action of arms h. This treatment is continuedusually from an hour and a half to two hours, or until certain chemicalchanges Well known to the trade have taken place. Next, by means of pipeE, the Wort is drawn off and the refuse malt is removed through handholeP', and the inside of the vessel is cleansed. The wort is then returnedto the vessel and the latter is closed, after which the wort is heatedto some degrees above the boilingpoint. Meantime air under pressure isforced through pipe E, such air and the vapor from the wort being drawnoff through pipe .I by means usually of a fan, (not shown,) so as tocause a partial vacuum in the vessel. This treatment of purifying thewort is continued ICO usually from three and a half to four hours. Thehops are then introduced through handhole P, and the Vessel is againclosed. The mass is heated until a steam-pressure of about twenty-tivepounds per square inch is had in the vessel, the mass meantime beingmore or less stirred. This latter treatment is continued until the beeris sufficiently cooked, after which it is drawn off through pipe E. Thevessel is then cleansed and is ready for another charge.

What I claim is- 1. A combined Wort-Vat and brewing-kettle, consisting,essentially, of an upright Vessel having a cylindrical upper sect-ionjoined to an inverted conical lower section, the lower having asteam-jacket, an upright shaft, and attached inclined arms or blades forstirring purpose, and wings arranged on the internal periphery of theVessel for defiecting the mass toward the center of the Vvessel, vthe'parts being arranged substantially as set forth.

2. In a combined wort-vat and brewing-kettle, the combination, withupright vessel, steam-jacket surroundinga portion of the latter, a shaftrevolubly supported in the Vessel, stirring-arms attached to the shaft,and deecting-wings on the inner wall of the vessel, of safety-valve,pipes leading, respectively, from the top and bottom of the Vessel, andhand-holes for charging and discharging the Vessel, the parts beingarranged substantially as set forth.

In testimony whereof I sign this specification, in the presence of twowitnesses, this 3 10th day of February, 1888.

WENZL MEDLIN.

Witnesses: Y, f

CHAs. H. DoRnR, ALBERT E. LYNCH.

